I have one pick list field called status which contain a values called draft,pre-publish, published and canceled if status is changed to pre publish the value draft should be disabled how can i achieve this in vf page

Hi all there is a requirment to genrate a word document by using visualforce page. but my page contain images while geting page to word document images are not displaying . if anybody  knows solution please provide .

Thanks,
Kiran

 is it  possible to do so by using "startChatWithWindow()" from the Live Agent API. By passing in the name of an iFrame it will open up the chat within the iFrame instead of a new window. please provide a solution for the reqirment . My reqirment is to get the chat window in the same window  not in seperate window .

 I have one pick list field called status which contain a values called draft,pre-publish, published and canceled if status is changed to pre publish the value draft should be disabled how can i achieve this in vf page